Iran has stopped oil sales to France and UK in protest on economic sanctions placed the EU on them for the developing nuclear program. The move comes as UN officials go to Tehran to discuss the program. It is largely a symbolic move as the UK and France don't buy much Iranian oil.
http://www.reuters.com/article/2012/02/19/us-iran-nuclear-idUSTRE81I0OS20120219
http://www.reuters.com/article/2012/02/19/us-iran-nuclear-idUSTRE81I0OS20120219